Why does my mother become a stepmother when I have a stepmother? Ouch!

Because that man represents the bright future that your mother yearns for, and you represent the past that your mother doesn't want to look back. However, your mother will definitely not admit this statement, which is a subconscious, hehe, but it doesn't mean that your mother doesn't love you. Face the present life with a normal heart and tell your mother that what she loves is what you love, and you want her to be happy. Take care of yourself and arrange your life. Maybe you will find that your life is no different from that of ordinary family children.